can't inject TaskInstance with @In, causes Exception
cali85 Mar 29, 2009 10:41 PMHi,
I'm working with Seam and jBPM.
I start a task and I want to get the name of the TaskInstance. So I try to inject the TaskInstance:
@In TaskInstance task;
This causes the folowing exception:
org.jboss.seam.RequiredException: @In attribute requires non-null value: pasis_offen.task org.jboss.seam.Component.getValueToInject(Component.java:2297) org.jboss.seam.Component.injectAttributes(Component.java:1703) org.jboss.seam.Component.inject(Component.java:1521) org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:61) org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) org.jboss.seam.core.ConversationInterceptor.aroundInvoke(ConversationInterceptor.java:65) org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) org.jboss.seam.bpm.BusinessProcessInterceptor.aroundInvoke(BusinessProcessInterceptor.java:51) org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44) org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107) org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185) org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103) org.jboss.seam.example.todo.Pasis_Offen_$$_javassist_4.getThema(Pasis_Offen_$$_javassist_4.java) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) javax.el.BeanELResolver.getValue(BeanELResolver.java:62) javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53) com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72) org.apache.el.parser.AstValue.getValue(AstValue.java:118) org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:101) javax.faces.component.UIOutput.getValue(UIOutput.java:184) com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201) com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:284) com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:154) javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:861) javax.faces.component.UIComponent.encodeAll(UIComponent.java:937) javax.faces.render.Renderer.encodeChildren(Renderer.java:148) javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837) javax.faces.component.UIComponent.encodeAll(UIComponent.java:930) javax.faces.component.UIComponent.encodeAll(UIComponent.java:933) com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:266) com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:197) org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:87) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) javax.faces.webapp.FacesServlet.service(FacesServlet.java:266) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
What could be the reason that the @In attribute has a null value? I guess the task is already started. I don't understand that....
Your help would be appreciated!!!
Best Regards